Lock for folding doors



I Jan, 28,

Filed June 15, 1955 J. c. RAINMAN LOCK FORIFOLDING DOORS 3 Shets-Sheet 3 J-E'Q, Z5.

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Jan. 28,1958 c, RAlNMAN 2,821,422

LOCK FOR FOLDING DOORS Filed June 13, 1955 3 Sheets-Sheet 2 35 9 a I 90 84 O\ 3 v6 86 f a J x 49 y' 28, 1953 J. c. RAINMAN 2,821,422

LOCK FOR'FOLDING DOORS Filed June 15, 1955 s Shets-Sheet 3 .2 15 1 2 2a 11a g I 10.9

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United States Patent 13 Claims. (Cl. 292-113) This invention relates to a door lock and, more particularly, to a door lock adapted to be utilized in conjunction with longitudinally movable, rather than hinged,

doors.

In order to describe the construction and mode of operation of the door lock of my invention, it will be illustrated as incorporated for use in a door of the folding type, but it is, of course, not intended that the lock of my invention be limited to this particular application since it is conceivable that it will have uses with many other types of longitudinally moving doors.

However, longitudinally movable, accordion-type folding doors of the character wherein the exterior surfaces of the door are constituted by a web of fabric pose certain lock and latch problems which it is the intention of the present invention to overcome. For instance, since the conventional accordion-type folding door is covered with a web of fabric on each side thereof, it is frequently quite difficult to bring the edge or stile of the door into alignment with the edge or stile of a companion door or with the jamb of an opening in which the door is located due to the fact that there is an inherent spring in the material or fabric covering the door which tends to resist the final increment of closing movement of the door. When a conventional lock or latch is utilized, this poses quite a problem since a final effort to close the door must be made simultaneously with energization of the latch or lock to maintain the door in closed position. When children or women utilize these doors and attempt to close the same, the inherent spring of the doors frequently prevents their being closed.

It is, therefore, an object of my invention to provide a door lock for longitudinally movable doors of accordiontype construction, said door lock including a bolt which, I i

when inoperative, is retracted Within the stile or edge of the door but which can be extended to approximately its full length beyond the edge of the door or the stile of the door to engage a strike located in the jamb of the door opening or in the adjacent stile or edge of another door. When the strike has been engaged, the bolt can then be retracted into the stile or edge of the door in which it is located to draw the stile or edge of the door toward the adjacent jamb or toward the adjacent stile or edge of a companion door. Therefore, the lock of my invention serves, not only to lock the door, but'also serves to completely close the door prior to the locking thereof.

Since folding doors of the character under consideration have an inherent spring to them which tends to cause them to move toward open position, there is a continual load upon the bolt of a lock for said doors tending to create a frictional load between the strike with whichthe bolt is engaged and the bolt itself which also, to a certain extent, resists opening of the lock.

It is, therefore,-an object of my invention to provide a door lock for accordion-type folding doors which includes positive releasing means for releasing the bolt from locked position, thus liftingthe bolt from, engage- 2,821,422 Patented Jan. 28, 1958 ment with an associated strike and instantaneously returning the lock to unlocked condition.

Another object of my invention is the provision of a lock of the aforementioned character which includes a bolt having a hook-shaped portion thereupon engageable with an associated strike, said bolt being extensible through an axial opening in the edge of the door with which it is associated to engage the strike by being raised into a position in which it will be juxtaposed to the opening in said strike.

An additional object of my invention is the provision of a bolt of the aforementioned character which can, after having been engaged in looking engagement with a strike, be lifted into a higher position to release the hook-shaped portion thereof from operative and locking engagement with its associated strike, thus permitting instantaneous release of the bolt and return of the door to unlocked condition. I

A further object of my invention is the provision of a lock of the aforementioned character which includes a movable carrier having the bolt pivotally mounted therein and bodily movable thereby, the bolt being additionally movable with respect to the carrier to permit it to assume a lowermost, unlocked and an intermediate, locked position.

Another object of my invention is the provision, in a lock of the aforementioned character, of dogging means adapted to maintain the bolt in locked position so that the bolt cannot be raised out of operative relationship with the strike with which it is associated by jimmying or other techniques.

Another object of my invention is the provision of a lock of the aforementioned character which includes releasing means engageable with the bolt to dislodge the bolt from operative relationship with its associated strike subsequently to the release of the locking dog from en gagement with the bolt.

A further object of my invention is the provision of a lock of the aforementioned character which can be readily adapted for latching, privacy latching, and keyed locking so that the basic construction of the lock will be similar in all applications and so that the lock can be readily modified from a plain latch to a privacy or keyed lock set. This materially reduces the cost of fabrication of any one of these particular types of latches or locks since the same basic assembly is used in all.

A further object of my invention is the provision of a relatively simple and easily manufactured lock which can be easily and readily installed in the edges or stiles of doors of the longitudinally movable type.

Other objects and advantages of my invention will be apparent from the following specification and the accomutilized;

Fig. 2 is an enlarged fragmentary, front elevational view of a lock constructedin accordance with the teachings of my invention;

Fig. 3 is a vertical sectional view taken on the broken line 33 of Fig. 2;

Fig. 4 is a transverse sectional view taken on the broken line 44 of Fig. 2;

Fig. 5 is an enlarged sectional, fragmentary view showing the lock of my invention in unlocked condition with the bolt thereof disposed in its lowermost, inoperative position;

Fig. 6 is a view similar to Fig. 5 showing the lock with the bolt in extended position and engaged upon the strike located in an adjacent jamb of the door opening prior to the-Withdrawing of the bolt into its retracted position to complete the locking thereof;

Fig. 7 is a view similar to Figs. and 6 showingthe lock in locked condition;

Fig. 8 is a view similar to Figs. 5-7 showing the bolt raised into its third, uppermost position in which it releases the strike with which it is associated;

Fig. 9 is an enlarged fragmentary view of the carrier incorporated in the lock of my invention;

Fig. 10 is a fragmentary, front elevational view of a privacy lock set incorporating the teachings of my invention;

Fig. 11 is a vertical sectional view taken on the broken line 119-11 of Fig. 10;

Fig. 12 is a vertical sectional view showing the privacy set of Fig. 10 in locked condition;

Fig. 13 is a view similarto Fig. 12 showing the privacy lock set in releasing condition;

Fig. 14 is a transverse, sectional view taken on the broken line 1414 of Fig. 13;

Fig. 15 is a transverse, sectional view taken on the broken line 1515 of Fig. 13;

Fig. 16 is a partly sectional view showing a keyed lock set constructed in accordance with the teachings of my invention;

Fig. 17 is a front elevational view of the exterior escutcheon plate constituting a part thereof;

Fig. 18 is an enlarged, fragmentary view of a portion of the locking mechanism of the keyed lock set of Fig. 16;

Fig. 19 is a longitudinal, partly sectional view taken on the broken line 1919 of Fig. 16; and

Fig. 20 is an enlarged, partially sectional view showing the actuating cam of the locking mechanism incorporated in the keyed lock set of Fig. 16.

Referring to the drawings and particularly to Figs. 1-4

thereof, I show a lock 10 constructed in accordance with the teachings of my invention and adapted particularly for use in conjunction with a longitudinally movable, accordion-type folding door 12 of the character shown in Fig. 1 of the drawings. The folding door 12 is suspended from a lateral edge thereof in the door opening 14 and the opposite external surfaces thereof are constituted by webs of fabric 15 which are laid over and supported upon a collapsible accordion-type frame, not shown. Mounted in the jamb 16 of the door opening 14 is a strike plate 18. Although there is shown in Fig. 1 of the drawings only one accordion-type folding door 12 which is adapted to be moved into closed relationship with the opening 14 and to abut on the jamb 16 thereof, it is, of course, common practice to use a pair of accordion-type folding doors 12 and to provide the strike in the stile or edge of one of the doors.

The movable edge of the door 12 is constituted by an elongated channel-shaped stile 20 having a front wall 22 and side walls 24 which define a vertically oriented recess 25. The stile 20 is, as best shown in Fig. 3 of the drawings, provided with upper and lower pairs of mounting openings 26 and 28, respectively, which are formed in the side walls 24 thereof and which constitute the means, as shall hereinafter be described in greater detail, for mounting the component parts of the lock 10 in operative relationship with the stile 20.

Formed in the side walls 24 of the stile 20 adjacent the upper pair of mounting openings 26 is a pair of spindle receiving openings 30 and a much larger pair of openings 32 is provided below the spindle receiving openings 30 for the reception of locking components when the lock 10 is adapted for use as a keyed lock set, as in Fig. 16 of the drawings.

Inner and outer escutcheon plates 34 and 36, respectively, are mounted on the stile 20. The outer escutcheon plate 36 is provided with laterally extending bosses 38 which project through the upper and lower pairs of mounting openings 26 and 28 and which are provided with tapped bores 40 in their innermost ends.

The inner escutcheon plate 34 is provided with bores 42 which are counterbored, as at 44, for the reception of the ends of the bosses 38, the bores 42 being adapted to receive mounting screws 46 which extend into the tapped bores 40 in the inner extremities of the bosses 38 to maintain the inner and outer escutcheon plates 34 and 36 in operative relationship with each other and in operative relationship with the stile .20 upon which they are mounted.

Spindle means 48 extends through the pair of spindle receiving openings 30 in the stile 20 and is, as best'shown in Figs. 5-8 of the drawings, .provided with a square portion 49 of square cross section, for a purpose which will be described in greater detail below. The inner and outer ends of the spindle means 48 have inner and outer actuators 50 and 52 mounted thereupon, the outer actuator being fastened to the end of the spindle means by a pin 54 and the inner actuator 50 being secured to the inner extremity of the spindle means 48 by a set screw 56. The actuators S0 and 52 are both provided with integral cylindrical bosses 58 which extend through openings 60 in the escutcheon plates 34 and 36 and which are journaled therein.

Spacer sleeves 62 encompass the opposite ends of the spindle means 48 and serve to journal the spindle means 48 in the spindle receiving openings 30 in the side walls 24 of the stile 20.

Mounted upon the intermediate square portion 49 of the spindle means 48 for rotatable movement with the spindling means 48 is a carrier 66, said carrier being, as best shown in Fig. 3 of the drawings, substantially U or channel-shaped in vertical section, the U-shaped configuration of the carrier being defined by a transverse top wall 68 having spaced lobes or ears 70 formed integrally therewith and depending therefrom. Pivotally supported between the cars 70 on a pivot pin 74 is a bolt 76 which has a hook-shaped portion 78 on its outer extremity for engagement with the strike 18, in a manner to be described in greater detail below.

The inner extremity of the bolt 76 is of arcuate configuration, as best shown in Figs. 5-8 of the drawings, and the pivot pin 74 supporting the same is located to one side vof the axis of rotation of the spindle means 48.

Formed integrally with the top wall 68 of the carrier 66 is a stop lug 80 which extends perpendicularly to the plane of the top wall 68 of the carrier 66 and which is adapted to limit rotational movement of said carrier, in a manner to be described in greater detail below. It will be noted that the stile 20 is provided with a substantially rectangular, axially oriented bolt receiving opening 82 through which the bolt 76 can be extended or retracted, said opening being generally aligned with a smaller opening 84 in the strike 18.

A pair of bolt dogging ears 88, as best shown in Figs. 5-9 of the drawings, are formed integrally with the carrier 66 and extend across the space between the lobes 70 of the carrier 66 to engage the top of the bolt 76 and maintain the bolt 76 in locked condition. Furthermore, the top wall of the carrier 66 also serves as bolt releasing means for the bolt 76 to dislodge the bolt 76 from its locked position.

During the operation of the lock 10 the carrier 66 is movable from its original erect position shown in Fig. 5 of the drawings. The carrier is located in said erect position by the impingement of the stop lug 80 upon the upper boss 38 of the outer escutcheon plate 36, said upper boss thus serving as an upper stop abutment 94 in the stile 20. When the carrier 66 is located in the aforementioned erect position with the bolt 76 disengaged from the strike 18, the bolt will assume a first,

lowermost, unlocked position wherein the hook portion on the outer extremity thereof engages the lower edge of the axially oriented bolt receiving opening 82 in the stile 20. It is readily apparent that the free relative movement of the bolt 76 with reference to the carrier 66 permits the bolt 76 to fall into its first, lowermost, unlocked position and it is also apparent that if the stop lug 80 did not engage the upper abutment 38 to limit rotation of the carrier 66 the bolt 76 would be drawn further into the elongated recess 25 within the stile 20 and thus drop within the said recess and be difficult to extricate therefrom.

During the locking operation the stile 20 is urged longitudinally toward the jamb. 16 of the door opening 14 against the previously referred to inherent resilience of the door 12 until the stile 20 is located in a position,

- such as that shown in Fig. 5, wherein the stile 20 is still spaced a considerable distance from the jamb 16 and the strike 18 mounted therein. In the utilization of prior art lock or latch constructions for doors of the character here under consideration, it has been necessary to tug on the stile of the door until the stile was in close proximity to the jamb or to the stile of an adjacent door in order that registry of the bolt of the lock or latch with the strike in the stile or jamb might be obtained.

However, with the construction of my invention, when the position of the stile shown in Fig. 5 has been obtained, either of the actuators 52 or 50 can be rotated to cause concomitant rotation of the spindle means 48 and simultaneous rotational movement of the carrier 66. When such rotational movement of the carrier 66 occurs, the carrier causes the bolt 76 to be moved from the position shown in Fig. 5 to that shown in Fig. 6 wherein the bolt 76 is extended across the distance between the stile and the jamb to engage the lip 98 of the strike 18 by passing through the opening 84 in the strike 18.

When the bolt carrier 66 is rotated from its erect position, shown in Fig. 5 of the drawings, to the inverted position, shown in Fig. 6 of the drawings, the pivot pin 74 upon which the bolt 76 is mounted is carried from a point to the left of and slightly above the axis of rotation of the spindle means 48 to a point to the right of and slightly below the axis of rotation of the spindle means 48, as seen in Figs. 5 and 6 of the drawings. Thus, the rotational movement of the carrier 66 causes the bolt 76 to be moved from its lowermost unlocked position to an intermediate upper position wherein the curved, hook-shaped outer extremity 78 of the bolt 76 engages the angularly oriented lip 98 of the strike 18 and is cammed upwardly until the hook-shaped portion 78 of the bolt 76 engages the said lip of said strike.

Since the bolt 76 is adapted for free pivotal movement with respect to the carrier 66, the final movement of the bolt 76 into locked position occurs independently of the rotation of the carrier 66 which ceases prior to the locking engagement of the bolt 76 uponthe strike 18. The final locking movement of the bolt 76 is caused by the camming action of the hook-shaped portion 78 on the outer extremity thereof on the inclined lip 98 of the strike 18.

However, when the hook-shaped portion 78 on the outer extremity of the bolt 76 engages the lip 98 of the strike 18, there is still a considerable space between the stile 20 of the door 12 and the jamb 16 of the door opening 14. To eliminate this space, the carrier 66 is once again rotated into its erect position, as shown in Fig. 7, to retract the major portion of the bolt 76 into the recess 25 defined by the stile 20, thus causing the stile 20 to be drawn into closer contiguity with the jamb 16 of the door opening 14 and thus accomplishing the final closing action of the door. In this manner, the lock of my invention serves to accomplish the diflicult final closing of the door 12 and the problems encountered with prior art devices in registering the stile of the door with an adjacent jamb or with the stile of an adjacent door are eliminated.

When the carrier 66 returns to its erect position, the stop lug 80 thereupon, of course, impinges upon the upper stop abutment 94 and further rotational movement of the carrier 66 is prevented. With the carrier 66 located in its erect position and with the bolt 76 engaged upon the strike 18, the dogging lugs 88 impinge upon the upper edge of the bolt 76 to dog said bolt in locked position and to prevent the bolt from being sprung out of locked engagement with the strike 18. The relatively small space between the stile 20 of the door 12 and the jamb 16 of the door opening 14 is conventionally sealed by an elongated gasket mounted on the outer wall 22 of the stile 20 and the space shown between these members in Fig. 7 of the drawings is thus closed.

Since the pivot pin 74 is located beyond and above the axis of rotation of the spindle means 48 and since the dogging lugs 88 impinge on the upper edge of the bolt 76, there is a dead locking action on the bolt 76 which retains it in locked engagement upon the lip 98 of the strike 18.

In order to release the bolt 76 from locking engagement with the lip 98 of the strike 18, the bolt carrier 66 is rotated from its erect to the inverted position shown in Fig. 8 of the drawings. Since it is necessary to lift the bolt 76 and, more particularly, the hookshaped portion 78 on the outer extremity thereof out of engagement with the lip 98 of the strike 18, the bolt carrier 66 must be rotated beyond the position assumed by it when the bolt 76 is located in its upper locking position, as shown in Fig. 6 of the drawings. Therefore, the bolt carrier 66 is rotated beyond the aforementioned position to cause the releasing means 90 constituted by the interior of the top wall 68 of said carrier to engage the lower edge of the bolt 76 and to raise it upwardly into its third, uppermost unlocking or releasing position wherein the bolt 76 is lifted bodily out of engagement with the lip 98 of the strike 18 to sever the locking and operative relationship between said bolt and said strike.

In order to limit travel of the carrier 66 beyond a predetermined point, the stop lug 80 thereupon engages a lower locking abutment 100 constituted by the inner surface of the front wall 22 of the stile 20 immediately adjacent the lower edge of the axial bolt receiving opening 82 in the stile 20.

Of course, the rotation of the carrier 66 from its erect to its inverted position permits the extension of the bolt 76 through the opening 82 and thus the stile 20 and the jamb 26 are spaced from each other a distance indicated in Fig. 8 of the drawings prior to the unlocking of the bolt 76 by the movement thereof through the medium of the carrier 66 into the uppermost unlocking or releasing position. In this manner, the load and tension on the bolt 76 is released prior to the unlocking thereof.

After the bolt 76' has been moved by the action of the carrier and, more particularly, the releasing means thereupon constituted by the interior of the top wall 68 of said carrier from its locked engagement upon the strike 18, the carrier 66 can be rotated into its original erect position shown in Fig. 5 of the drawings. When so rotated the stop lug 80 will ultimately engage upon the upper stop abutment 94 to prevent rotation of said carrier beyond the predetermined erect point. At this juncture the bolt 76 will return to the lowermost unlocked position wherein it engages the lower edge of the opening 82 in the stile 20 and in which it is ready, once again, for the locking and unlocking cycle described hereinabove.

There is thus provided by the invention a locking mechanism which is particularly adapted for utilization in conjunction with longitudinally movable doors and which is also especially adapted for use in conjunction with longitudinally movable doors of the accordion type since it incorporates a bolt movement which permits the bolt to be utilized in both closing the door in which it is installed and prior to finally locking the same. Other .features of the lock of the invention include the dead locking ofthe-same by dogging means incorporated in the carrier for the bolt, means for limiting rotation of the carrier at its erect and inverted positions, and means for releasing the bolt from operative and locking engagement with a strike in a positive manner.

One of the most desirable aspects of the lock of my invention is the fact that the constituent parts thereof, previously described hereinabove, can be utilized without any modification whatsoever in privacy and lock set applications wherein there is incorporated, in conjunction with the basic construction previously described, means ,for locking the door from the interior thereof or key actuated means for unlocking the door from the exterior thereof.

'For instance, the basic construction previously discussed can be incorporated in a privacy set 104, best shown in Figs. -15 of the drawings, adapted for use in conjunction with doors utilized in the door openings to bedrooms, bathrooms, and the like, wherein it is desired to provide positive locking means energizable from the interior side of the door to permit minimum privacy conditions to be established and to prevent opening of the door from the exterior thereof except by emergency means.

The privacy lock set 104 includes the same working parts as the lock previously described hereinabove and the identical working parts incorporated in the privacy lock set 104 will be designated in the description hereinbelow by the same numerals previously utilized in designating said parts in the previously discussed embodiment of the invention.

The major distinction of the privacy lock set 104 over the lock 10 lies in the provision of positive locking means 106 constituted by an elongated, vertically oriented, channel-shaped locking bar 108 which, as best shown in Fig. of the drawings, is substantially U-shaped in transverse cross section and the spaced legs 110 of which straddle the bolt carrier 66 to permit vertical movement of the locking means 106 with respect to said carrier.

The locking bar 108 is provided, in its oppositely disposed legs 110 adjacent the upper extremities thereof, with coincident elongated openings 112 encompassing the upper boss 38 on an outer escutcheon plate 114. Aligned, elongated openings 116 are provided in the legs 110 and encompass the spindle means 48 while aligned, circular openings 118 are provided in the lower extremity of the locking bar 108 for the reception of portions of a locking bar actuating cam member 120.

Provided on the upper extremity of the locking bar 108 is an integral, laterally extending dogging lug 122, best shown in Figs. l214 of the drawings, adapted to engage the stop lug 81) on the bolt carrier 66 to prevent rotation thereof from its erect position and thus to prevent unlocking of the bolt 76', in a manner to be described in greater detail below.

The actuating cam member 120, as best shown in Figs. 11-13 and of the drawings, includes a substan tially circular body 126 having a radial lug 128 formed integrally therewith and a radial rib 130 also formed integrally with said circular body and extending therefrom in a direction opposite to the radial lug 128.

Formed on the opposite sides of the radial lug 128 are arcuate lands 134 which engage the edges of the coincident circular openings 118 in the legs 110 of the locking bar 108. Since the width of the rib 130 is less than the width of the body 126, the rib 130 defines, in conjunction with the body 126, arcuate lands 136 also engaging the edges of the circular openings 118, as best shown in Fig. 11 of the drawings.

A transverse bore 138 is formed in the body 126 of the actuating cam member 121) for the locking bar 108, said transverse bore being divided, as best shown in Fig. 20 of the drawings, into two semi-circular bores, amajor bore 140 and a minor bore 142. Oppositely disposed shoulders 145 at the juncture between the major and minor bores and 142, respectively, define the limits of said semi-circular bores.

The innerescutcheon plate 144 is provided with an inwardly directed boss 146 having a bore therein and the outer escutcheon plate 114 is provided with a similar boss 146 having a similar bore therein, the inner escutcheon plate mounting a spindle 148 extending through said bore and having an actuating button 150 thereupon. The inner extremity of the spindle 148 is half-round and, as best shown in Fig. 15 of the drawings, fits within the major semi-circular bore 140 with its flat side 148 ongaging the shoulders defining the limits of said major semi-circular bore. An outer spindle 152 is journaled in the bore in the boss 146 of the outer escutcheon plate 114 and is provided with a screw head 154, as best shown in Fig. 10 of the drawings, to permit the emergency to tation of the cam actuating member 120 by virtue of the engagement of its inner half-round end in the major semi-circular bore 140, as best shown in Figs. 11 and 15 of the drawings.

In order to limit rotation of the actuating cam member 120 by either the inner or outer spindles 148 or 152, respectively, upper and lower stop tabs 156 and 158 are provided on the locking bar 108, as best shown in Figs. 12 and 13 of the drawings.

The elongated locking bar 108 is, as best shown in Figs. 12 and 13 of the drawings, movable between a lowermost, locked position and an uppermost, released position by the action of the actuating cam member 120, in a manner to be described hereinbelow. Since the axis of rotation of the spindles 148 and 152 is eccentrically located with respect to the arcuate lands 134 and 136 on the radial lug 128 and defined by the radial rib 130, when the actuating cam member is rotated into the position shown in Fig. 13 wherein the radial lug is in the uppermost position, the locking bar 108 will be raised by the engagement of the lands 134 with the edges of the oppositely disposed circular openings 118. When the radial lug 128 reaches its uppermost position, as shown in Fig. 13 of the drawings, it engages the upper stop tab 156 on the locking bar 108 to prevent further rotation thereof.

Conversely, when it is desired to lock the privacy lock set 104, the spindle 148 can be rotated to dispose the radial lug 128 in its depending position, as best shown in Fig. 12 of the drawings, and to cause the arcuate lands 136 to engage the edges of the openings 118 thus permitting downward movement of the locking bar 108 and the disposition of the dogging lug 122 on the upper extremity of the locking bar 108 adjacent the stop lug 80 on the bolt carrier 66. The juxtaposition of the dogging lug 122 of the locking bar 108 adjacent to the stop lug 80 on the carrier 66 locks the stop lug 80 between the carrier and the upper abutment 94 constituted by the laterally extending boss 38 on the outer escutcheon plate 114 thus preventing movement of the carrier 66 and preventing dislodgement of the bolt 76 from locking engagement with the strike 18.

However, rotation of the actuating button will cause rotation of the spindle 148 and concomitant rotation of the actuating cam member 120, thus returning the radial rib 130 to the lower position shown in Fig. 13 of the drawings and returning the radial lug 128 to its uppermost position to cause the arcuate lands 134 formed thereupon to raise the locking bar 108 into its uppermost, unlocked position thus releasing the dogging lug 122 on the locking bar 108 from engagement with the stop lug 80 on the carrier 66. When this occurs the carrier 66 can be freely rotated by the action of the spindle means 48 to release the bolt 76 from operative and locking engagement with the strike 18.

Should the need arise, emergency unlocking of the locking bar 108 can be accomphshed by the rotation of the screw'head 154 on the outer extremity of the outer spin- 9 dle 152. .When the locking bar 108 is disposed in its locked position, the radial lug 128 of the actuating cam member 120 engages the bottom stop tab 158 to prevent rotation of the cam member 120 beyond a predetermined point.

The operation of the carrier 66 and the bolt 76 in locking and unlocking the bolt 76 in operative relationship with or from the strike 18 is identical with the operation of these members in the previously discussed embodiment 10 of the invention.

As previously indicated, the lock of my invention is also adapted for use as a keyed lock set 160, shown in Figs. 16-20 of the drawings. The major difference between the keyed lock set 160 and the previously discussed privacy set 104 lies in the provision of an outer escutcheon plate 162 which is provided with an enlarged bore 164 intermediate the upper and lower ends thereof for the reception of a cylinder lock 166 of conventional construction. The cylinder lock 166 is, as best shown in Figs. 16 and 18 of the drawings, retained in the bore 164 by the action of a retainer plate 168 and the plug 170 of said lock has an actuating blade 172 mounted thereupon.

Therefore, when the locking bar.108 is shifted into its lowermost locked position, as shown in Fig. 12, by the action of the control button 150, the cylinder lock 166, by virtue of the blade 172 in the plug 170, can be utilized, when a proper key is inserted in the plug 170, to rotate the actuating cam member 120 and return the locking bar 108 to uppermost unlocked position. The movement of the locking bar 108 from its locked to unlocked positions is accomplished by the impingement of the blade 172 on one of the shoulders 145 to rotate the actuating cam member 120 and return the radial lug 128 thereupon to its uppermost position, as shown in Fig. 13 of the drawings.

In all other respects the operation of the keyed lock set 160 is substantially identical with that of the previously discussed embodiments 104 and 10 of the invention. It can be readily seen, therefore, that by the provision of the lock of my invention in conjunction with various amiiliary components, it is possible to modify said lock for use as a privacy or keyed lock set. Moreover, the lock of my invention is characterized by its simplicity of construction and ease of operation and by the fact that the bolt thereof can be utilized to draw a door in which it is installed into closed position adjacent the jamb or stile with which it is associated.

In addition, positive releasing and unlocking means is provided in the lock for releasing the bolt of the lock from operative relationship with its associated strike.

Other inherent advantages and features of the invention will have been made apparent hereinabove.

I claim as my invention:

1. In a door lock for a folding door, the combination of: spindle means; inner and outer actuators secured to said spindle means; a rotatable carrier mounted on said spindle means; an elongated bolt member pivotally mounted on said carrier for free movement with respect thereto; and a dog on said carrier for engaging said bolt member to prevent dislodgement of said bolt member from its locked position.

2. In a door lock for a folding door, the combination of: spindle means; inner and outer actuators secured to said spindle means; a rotatable carrier mounted on said spindle means; an elongated bolt member pivotally mounted on said carrier for free movement with respect thereto, said bolt member being positionable by said carrier in a lowermost, released position, an intermediate, locked position or an uppermost unlocking position; and a dog on said carrier for engaging said bolt member to prevent dislodgement of said bolt member from its upper locked position.

3. In a latch disposable in the edge of a longitudinally translatable door, said edge having a bolt receiving opening .therein, the combination of: spindle means extending transversely through said edge; actuator means for rotating said spindle means; a rotatable carrier on said spindle means; an elongated bolt extensible or retractible through said opening and pivotally movable on said carrier independently of the movement thereof into a lowermost retracted position engaging the lower edge of said opening; a stop abutment in the edge of said door; and a lug on said carrier engageable with said stop abutment to limit rotation of said carrier and prevent dislodgement of said bolt from said lowermost position.

4. In a latch disposable in the edge of a longitudinally translatable door, said edge having a bolt receiving opening therein, the combination of: spindle means extending transversely through said edge; actuator means for rotating said spindle means; a rotatable carrier on said spindle means; an elongated bolt pivotally mounted in said carrier for free movement with respect thereto, said bolt having a hook portion on its outer extremity for engagement with a strike plate and being extensible by rotation of said carrier through said opening into a second position in which the hook engages said strike plate to lock said door; and a dog on said carrier engageable with said bolt to prevent free pivotal movement of said bolt with respect to said carrier.

-5. In a latch disposable in the edge of a longitudinally translatable door, said edge having a bolt receiving opening therein, the combination of: spindle means extending transversely through said edge; actuator means for rotating said spindle means; a rotatable carrier on said spindle means; an elongated bolt pivotally mounted in said carrier for free movement with respect thereto, said bolt having a hook portion on its outer extremity for engagement with a strike plate and being extensible by rotation of said carrier through said opening into a second, intermediate position in which the hook engages said strike plate to lock said door; and releasing means on said carrier directly engageable with said bolt to disengage said hook portion thereof from said strike plate, said releasing means being urged into engagement with said bolt by the rotation of said carrier to lift said bolt into its uppermost, releasing position.

6. In a latch disposable in the edge of a longitudinally translatable door, said edge having a bolt receiving opening therein, the combination of: spindle means extending transversely through said edge; actuator means for rotating said spindle means; a carrier secured to said spindle means and rotatable between erect and inverted positions thereby; an elongated bolt pivotally mounted on said carrier for free rotation with respect thereto at a point displaced from the axis of rotation thereof; upper and lower abutments in said edge of said door; and a stop on said carrier engageable with said upper abutment to prevent rotation of said carrier beyond its erect position and engageable with said lower abutment to prevent rotation of said carrier beyond its inverted position.

7. In a latch disposable in the edge of a longitudinally translatable door, said edge having a bolt receiving opening therein, the combination of: spindle means extending transversely through said edge; actuator means for rotating said spindle means; a carrier secured to said spindle means and rotatable between erect and inverted positions thereby; an elongated bolt pivotally mounted on said carrier for free rotation with respect thereto at a point displaced from the axis of rotation thereof, the pivotal mounting point of said bolt in said carrier being disposed inwardly of and above the axis of rotation of said carrier when said bolt is retracted and outwardly of said axis when said bolt is extended; and a dog on said carrier engageable with said bolt when said carrier is disposed in its erect position and said bolt in its locked, intermediate position.

8. In a lock for a longitudinally translatable door having a bolt receiving opening in its edge, the combination of: spindle means extending transversely through said edge; actuator means for energizing said spindle means; a carrier movable by said spindle means in said edge; and a bolt mounted on said carrier for bodily movement thereby between extended and retracted positions in said opening and being freely pivotally movable with respect to said carrier into engagement with a strike plate, retraction of said bolt by said carrier moving said edge toward said plate to complete the closing of said door.

9. In a lock for a longitudinally translatable door having a bolt receiving opening in its edge, the combination of: spindle means extending transversely through said edge; actuator means for energizing said spindle means; a carrier movable by said spindle means between erect and inverted positions in said edge, said carrier having a stop thereupon; a bolt mounted on said carrier for movement thereby between extended and retracted positions in said opening and being movable with respect to said carrier into engagement with a strike plate, retraction of said bolt by said carrier moving said edge toward said plate to complete the closing of said door; and upper and lower stop abutments in said edge engageable by said stop when said carrier is disposed, respectively, in its erect and inverted positions to prevent rotation of said carrier beyond said positions.

10. In a lock for a longitudinally movable door having a stile provided with transverse and bolt receiving openings, the combination of: spindle means extending through said transverse opening; actuator means for said spindle means; a carrier movable by said spindle means and having bolt dogging and releasing means thereupon; and a bolt extensible or retractible through said bolt receiving opening by said carrier and being movable relative to said carrier, said bolt being engaged by said dogging means to maintain it in locked position and by said releasing means to move it into unlocked position.

11. In a lock for a longitudinally movable door having a stile provided with transverse and bolt receiving openings, the combination of: spindle means extending through said transverse opening; actuator means for said spindle means;

a carrier movable by said spindle means and having bolt dogging and carrier stop means thereupon; a bolt extensible or retractible through said bolt receiving opening by said carrier and being movable relative to said carrier, said bolt being engaged by said dogging means to maintain it in locked position; and stop abutments in said stile engageable by said stop means to limit movement of said carrier by said spindle means.

12. In a lock for a longitudinally movable door having a stile provided with transverse and bolt receiving openings, the combination of: spindle means extending through said transverse opening; actuator means for said spindle means; a carrier movable by said spindle means and having carrier stop means and bolt releasing means thereupon; a bolt extensible or retractible through said bolt receiving opening by said carrier and being movable relative to said carrier, said bolt being engaged by said releasing means to move it into unlocked position; and stop abutments in said stile engageable by said stop means to limit movement of said carrier by said spindle means.

13. In a lock for a longitudinally movable sliding door having an edge with a transverse opening and an axial bolt receiving opening therein, the combination of: a movable carrier mounted in said edge having a stop lug thereon; actuator means operatively connected to said carrier for moving the same; a bolt extensible or retractible through said axial opening pivotally mounted in said carrier for movement thereby and in respect thereto; and a vertically reciprocatable locking member engageable with said stop lug on said carrier to prevent movement thereof and thus cause said carrier to maintain said bolt in locked condition.

References Cited in the file of this patent UNITED STATES PATENTS 2,405,240 Shearer et al. Aug. 6, 1946 2,530,330 Groeger Nov. 14, 1950 2,540,686 Milburn Feb. 6, 1951 2,668,319 Keys et al. Feb. 9, 1954 

